Analytic Two-Loop Higgs Amplitudes in Effective Field Theory and the Maximal Transcendentality Principle

TL;DR

This paper computes the first two-loop Higgs plus three gluon amplitudes in effective field theory, revealing simple finite remainders and maximal transcendentality properties akin to N=4 super-Yang-Mills theory.

Contribution

It provides the first analytic two-loop amplitudes for Higgs plus three gluons including dimension-seven operators, advancing precision in Higgs production calculations.

Findings

Finite remainders have simple forms

Maximal transcendentality matches N=4 super-Yang-Mills

Infrared divergences agree with theoretical predictions

Abstract

We obtain for the first time the two-loop amplitudes for Higgs plus three gluons in Higgs effective field theory including dimension-seven operators. This provides the S-matrix elements for the top mass corrections for Higgs plus a jet production at LHC. The computation is based on the on-shell unitarity method combined with integration by parts reduction. We work in conventional dimensional regularization and obtain analytic expressions renormalized in the MS-bar scheme. The two-loop anomalous dimensions present operator mixing behavior. The infrared divergences agree with that predicted by Catani and the finite remainders take remarkably simple forms, where the maximally transcendental parts are identical to the corresponding results in N=4 super-Yang-Mills theory. The parts of lower transcendentality turn out to be also largely determined by the N=4 results.